Java Collections Test – 3

1. Which of these methods sets every element of a List to a specified object?

2. Which of these methods can randomize all elements in a list?

3. Which of these is true about unmodifiableCollection() method?

4. Which of these methods can convert an object into a List?

5. Which of these is an incorrect form of using method max() to obtain a maximum element?

6. What will be the output of the following Java program?

 
    import java.util.*;
    class Collection_Algos 
    {
        public static void main(String args[]) 
        {
            LinkedList list = new LinkedList();
            list.add(new Integer(2));
            list.add(new Integer(8));
            list.add(new Integer(5));
            list.add(new Integer(1));
            Iterator i = list.iterator();
	    while(i.hasNext())
	        System.out.print(i.next() + " ");
        }
    }

7. What will be the output of the following Java program?

 
    import java.util.*;
    class Collection_Algos 
    {
        public static void main(String args[]) 
        {
            LinkedList list = new LinkedList();
            list.add(new Integer(2));
            list.add(new Integer(8));
            list.add(new Integer(5));
            list.add(new Integer(1));
            Iterator i = list.iterator();
            Collections.reverse(list);
	    while(i.hasNext())
	        System.out.print(i.next() + " ");
        }
    }